Chinese Super League clubs could face further limits on fielding overseas players under new proposals.
The Chinese Football Association has written to clubs outlining plans to restrict the amount of non-Chinese players in a squad to four.
Clubs are currently allowed to field three overseas players in their starting line-up, with a total of five allowed in the squad.
The new regulations would allow clubs to sign six foreign players, but only four would be eligible for the squad, with the other two registered for the reserves.
The FA are also looking to introduce rules to prevent the loophole around fielding an under-23 player after several managers have substituted youngsters with less than 20 minutes on the clock.
The measures are part of the Chinese FA’s latest efforts to more tightly control football and promote homegrown talent.
Earlier this year, a 100 per cent tax was imposed on foreign signings costing more than $7.5million, in response to the huge sums spent to bring in overseas imports over recent seasons.